Water gun



FIG. 1 is a right side elevational view of a water gun in accordancewith my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The ornamental design for a water gun, as shown and described. 